#$%^&*AU2020201601A120200402.pdf#####Abstract: A user interface comprising: a mask having a mask body and a seal coupled to the mask body, the seal configured to seal with a user's face to allow a cavity defined by the mask body to be pressurized； a non-sealing nasal cannula including at least one nasal prong configured to deliver breathing gases to a user's respective nares, the nasal cannula extending into the mask cavity and having a breathing gas inlet through the mask body； headgear coupled to the mask to retain the user interface in position on a user's head； an additional breathing gas inlet provided in the mask body to allow breathing gases to be delivered to the cavity of the mask separate from the nasal cannula； and a gas outlet from the mask body configured to exhaust expired gases； wherein the user interface is configured to allow breathing gases to be delivered to the cavity of the mask and the nasal cannula from a single flow generator.WO 2011/078703 PCT/NZ2010/000260 5/10 500. 3 530 505 525 507 505 511 520 517 FIGURE 5
